Drive mechanism for a drug delivery device
AssigneeSanofi
InventorWilliam Marsh
Life of this patent
Estimating the term…
Abstract
A drive mechanism (4) for a drug delivery device comprising—a piston rod (14), —a trigger member (9) coupled with the piston rod (14) in such a manner that rotational movement between the piston rod (14) and the trigger member (9) is constrained in a first state, the trigger member (9) being elastically deformable in such a manner that the piston rod (14) is rotationally moveable with respect to the trigger member (9) in a second state, —a trigger button (10) being suitable for activating the deformation of the trigger member (9).
Claims19
A drive mechanism for a drug delivery device, the drive mechanism comprising:
- a piston rod,
- a trigger nut that is axially movable with respect to the piston rod,
- a trigger member surrounding the piston rod, the trigger member being coupled to the piston rod in such a manner that rotational movement between the piston rod and the trigger member is constrained in a first state, the trigger member being elastically deformable in such a manner that the piston rod is rotationally moveable with respect to the trigger member in a second state, and
- a trigger button configured to deform the trigger member, wherein a movement of the trigger button towards the trigger nut causes elastic deformation of the trigger member, and wherein the trigger nut is located in a hole of the trigger member.
A drug delivery device comprising:
- a housing;
- and
- a drive mechanism at least partially disposed within the housing, the drive mechanism comprising
- a piston rod,
- a trigger nut that is axially movable with respect to the piston rod,
- a trigger member surrounding the piston rod, the trigger member being coupled to the piston rod in such a manner that rotational movement between the piston rod and the trigger member is constrained in a first state, the trigger member being elastically deformable in such a manner that the piston rod is rotationally moveable with respect to the trigger member in a second state, and
- a trigger button being suitable configured to deform the trigger member, wherein a movement of the trigger button towards the trigger nut causes elastic deformation of the trigger member, and wherein the trigger nut is located in a hole of the trigger member.
A drug delivery device comprising:
- a housing;
- and
- a drive mechanism at least partially disposed within the housing, the drive mechanism comprising
- a piston rod,
- a trigger nut that is axially movable with respect to the piston rod,
- a trigger member coupled to the piston rod in such a manner that rotational movement between the piston rod and the trigger member is constrained in a first state, the trigger member being elastically deformable in such a manner that the piston rod is rotationally moveable with respect to the trigger member in a second state, and
- a trigger button configured to deform the trigger member, wherein a movement of the trigger button towards the trigger nut causes elastic deformation of the trigger member, and wherein the trigger member is centered along a longitudinal axis of the drug delivery device.
Dependencies are inferred from the claim text.